View Image Gallery of Incertae sedis

Parapellucens Gen. n.

Type species: aphrasta Collenette.

The two species included in this new genus have similarly unusual forewing venation, but very different male genitalia. In neither do they resemble the predominantly New Guinea genus Pellucens Bethune-Baker, itself in need of revision. Species in all are rather translucent, whitish, with somewhat rounded forewings.

The forewing venation has R1 arising independently from the cell, initially converging with Sc, then it diverges to converge with Rs at the point where R2 branches, then they too diverge. R2 branches off more distally than R5. All veins arise independently in the hindwing. In typical Pellucens, R1 of the forewing is only very slightly sinuous and is never very close to Sc or Rs.

The facies of both species is also similar, with greyish patches around the forewing margin and costa, and a discal grey spot.

Tymbal organs are present in the male abdomen. In the male genitalia of aphrasta the eighth tergite is highly modified into a setose plate with a triangular distal margin flanked by two long processes resembling the horns of a cow. The tegumen is strongly angled, with the uncus set in a relatively posterior position on it (as illustrated laterally by Holloway (1976: fig. 284)). The valves are distally bifid, small, with a setose bar uniting them basally. There is a small saccus. The male of the new species is strikingly different as described in the diagnosis below.

The female abdomen has a moderate corethrogyne on the seventh segment, but this segment is not expanded. In the genitalia, the ostium is set in a semicircular pouch and is narrowly flanked by a pair of longitudinal flanges that extend posteriorly to a central quadrate lobe. The ductus is very broad centrally, spindle-shaped, longer than the weakly bilobed bursa. There is no signum.

<<Back >>Forward <<Return to Contents page

Copyright Southdene Sdn. Bhd. All rights reserved.